python pdf转txt文本、pdf转json

一、前言

此方法只能转文本格式的pdf，如果是图片格式的pdf需要用到ocr包，以后如果有这方面需求再加这个方法

二、实现方法

1. 目录结构

2. 代码

pdf2txt.py 代码如下

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import json
import os

from pdfminer.pdfparser import PDFParser
from pdfminer.pdfdocument import PDFDocument
from pdfminer.pdfpage import PDFPage, PDFTextExtractionNotAllowed
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import PDFPageAggregator
from pdfminer.layout import LAParams


def batch_process(src_dir, tgt_dir):
    '''
    批处理
    :return:
    '''
    for pdf_name in os.listdir(src_dir):
        pdf_path = os.path.join(src_dir, pdf_name)
        text_path = os.path.join(tgt_dir, f'{os.path.splitext(pdf_name)[0]}.txt')
        json_path = os.path.join(tgt_dir, f'{os.path.splitext(pdf_name)[0]}.json')

        pdf_utils = PDFUtils()
        pdf_list = pdf_utils.pdf2list(pdf_path)

        # pdf2txt
        with open(text_path, mode='w', encoding='utf-8') as f:
            f.write(''.join([''.join(page) for page in pdf_list]))

        # pdf2json
        with open(json_path, mode='w', encoding='utf-8') as f:
            f.write(json.dumps(pdf_list, ensure_ascii=False))


class PDFUtils():

    def __init__(self):
        pass

    def pdf2list(self, path):

        pdf_list = []   # 二维数组，一维放页，二维放行
        with open(path, 'rb') as f:
            praser = PDFParser(f)

            doc = PDFDocument(praser)

            if not doc.is_extractable:
                raise PDFTextExtractionNotAllowed

            pdfrm = PDFResourceManager()

            laparams = LAParams()

            device = PDFPageAggregator(pdfrm, laparams=laparams)

            interpreter = PDFPageInterpreter(pdfrm, device)

            for page_idx, page in enumerate(PDFPage.create_pages(doc)):

                line_list = []   # 保存每行数据
                # print(page_idx)
                interpreter.process_page(page)
                layout = device.get_result()
                for line_idx, line in enumerate(layout):
                    # print(line_idx)
                    if hasattr(line, "get_text"):
                        content = line.get_text()
                        # print(content)
                        # output = StringIO()
                        # output.write(content)
                        # content = output.getvalue()
                        # output.close()
                        # print(content)
                        if content and content.replace(' ', '') != '\n':
                            line_list.append(content)
                            # print(content)


                pdf_list.append(line_list)

        # output.close()
        return pdf_list


if __name__ == '__main__':
	
	# pdf目录
    src_dir = './pdf'
    # 生成的txt和json文件的保存目录
    tgt_dir = './text_and_json'
    
    # 批量转换
    batch_process(src_dir, tgt_dir)